Heat conduction structure and cooker

Abstract

An interlayer filled with high-temperature-resistant liquid serving as a heat-conducting medium is arranged between a heat source and a heated container, the high-temperature-resistant liquid is tin, fused salt, vegetable oil and other materials, and the interlayer is of a closed or semi-closed structure to prevent the high-temperature liquid from overflowing. A supporting column is arranged in the interlayer, and a liquid injection opening and a sealing plug are arranged on the surface wall. When a tin plate and other solid materials are used for packaging, a liquid injection opening and a sealing plug can be omitted. The surface wall of the interlayer can be made of ultrathin soft materials such as aluminum foil, so that the interlayer can be better attached to a heated container and / or a heat source. The heat source is immersed in high-temperature-resistant liquid, and the interlayer also exists logically. Contact gaps are filled through flowing characteristics of liquid, contact thermal resistance is reduced, power is improved, and a good soaking effect can be obtained through convection of the liquid. The melting point and boiling point of tin, fused salt, vegetable oil and other materials are suitable for the common cooking temperature, and cost is low, and health and environmental protection are achieved. The cooker comprises the heat conduction structure.

Description

Technical Field

[0001] This invention relates to the field of heat transfer, and more particularly to the field of cookware. Background Technology

[0002] Currently, electric heating plates used in household cooking appliances are generally made by welding or riveting heating elements to a metal plate, or by die-casting a metal plate with the heating element as the core. The heating element consists of a metal tube as its outer shell, with spiral heating wires evenly distributed along the central axis inside the tube. The gaps are filled with compacted magnesium oxide sand, which has good insulation and thermal conductivity. Due to limitations such as the bending radius of the heating element, it cannot completely cover the metal plate. Therefore, the heat is relatively concentrated, with the heating element and its covered area having a higher temperature and the surrounding area having a lower temperature, resulting in uneven heating of the metal plate. This leads to problems such as poor cooking performance.

[0003] Application 201911244488.1 proposes an electric heating film consisting of a main body and a metal wrapping sheet. The main body is an electric heating wire covered with an insulating film on both sides, with the metal wrapping sheet sandwiching the main body within it. The metal wrapping sheet can be formed by folding a metal sheet, flattening a metal tube, riveting or welding the upper and lower metal sheets together. This electric heating film has good heat dissipation and can solve the problem of uneven heating in electric grill pans. However, in application, it was found that grill pans are generally large, but the placement of food during grilling is highly random; some areas without food heat up quickly, while others with food heat up more slowly. If a uniform heating method is used, the areas that heat up quickly are prone to overheating, causing the heating wire to burn out. If multiple electric heating films are used, the circuit is more complex and the cost is higher.

[0004] Glass kettles are slow conductors of heat, and because glass is prone to deformation during manufacturing, the bottom can be uneven, leading to poor contact with the heating element. Therefore, glass kettles generally have low wattage to prevent the heating element from overheating. Titanium kettles are also prone to deformation during manufacturing, resulting in uneven bottoms and poor contact with the heating element. Ceramic kettles and other cookware also have similar issues. While the contact between the bottom of an electric rice cooker and the heating element is slightly better than with glass kettles, it still needs further improvement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a heat-conducting structure and a cooking appliance.

[0006] A heat-conducting structure includes a jacket filled with a high-temperature resistant liquid as the heat transfer medium between a heat source and a container being heated. The high-temperature resistant liquid can be materials such as tin, molten salt, or vegetable oil. The high-temperature resistant liquid can directly contact the heat source and the container being heated. The jacket is a closed or semi-closed structure to prevent the high-temperature liquid from overflowing. The edges of the jacket do not generate heat, or have heat dissipation structures to allow the high-temperature resistant liquid to solidify or reach a lower temperature. Support pillars are provided within the jacket, and the surface wall has an injection port and a sealing plug. When using solid materials such as tin plates for encapsulation, the injection port and sealing plug can be omitted. The surface wall of the jacket can use ultra-thin and flexible materials such as aluminum foil, allowing the jacket to better fit the container being heated and / or the heat source. Logically, immersing the heat source in a high-temperature resistant liquid also involves the aforementioned jacket; for example, immersing an electric heating film in vegetable oil or an electric heating element in molten salt.

[0007] The beneficial effects of this invention are:

[0008] A heat-conducting structure includes a jacket filled with a high-temperature resistant liquid as the heat transfer medium between a heat source and a container being heated. The high-temperature resistant liquid can directly contact both the heat source and the container; good heat distribution can be achieved through liquid convection, and the liquid's flow characteristics can fill the contact gap, reducing contact thermal resistance; this can also increase power output. The high-temperature resistant liquids are materials such as tin, molten salt, and vegetable oil; these materials have melting and boiling points suitable for commonly used cooking temperatures, and are low-cost, healthy, and environmentally friendly. The jacket is a closed or semi-closed structure to prevent the high-temperature liquid from overflowing, making the product safer and more reliable. The edges of the jacket do not heat up, or have heat dissipation structures, causing the high-temperature resistant liquid to solidify or remain at a lower temperature, making the encapsulation of the high-temperature resistant liquid easier and more reliable. Support pillars are provided within the jacket to prevent collapse and failure, and to avoid excessive internal liquid pressure. The surface wall has an injection port and a sealing plug. When using solid materials such as tin plates for encapsulation, the injection port and sealing plug can be eliminated, simplifying production and reducing costs. The outer wall of the interlayer can be made of ultra-thin and flexible materials such as aluminum foil, allowing for better adhesion between the interlayer and the heated container and / or heat source. High-temperature resistant liquid is encapsulated within the interlayer, facilitating applications where the heated container can be separated from the heat source. Immersing the heat source in a high-temperature resistant liquid also logically involves the aforementioned interlayer; for example, immersing an electric heating film in vegetable oil or an electric heating element in molten salt. This reduces the number of heat transfer steps, lowers thermal resistance, and makes heating more efficient.

[0009] A cooking utensil comprising the aforementioned heat-conducting structure.

[0010] The beneficial effects of this invention are: This cookware has the same advantages as the aforementioned heat-conducting structure, which will not be repeated here. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the glass pot according to the present invention.

[0012] Figure 2 Figure 1 is a schematic diagram of the structure of the baking pan according to the present invention; Figure 2 is a schematic diagram of the structure of the rice cooker according to the present invention.

[0013] In the diagram, 1. interlayer, 11. support column, 12. liquid inlet, 13. sealing plug, 2. heating plate, 21. raised structure, 22. edge, 3. glass pot, 4. molten tin, 5. heating film, 6. baking tray, 7. molten salt, 8. rice cooker inner pot, 9. aluminum foil. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Example 1 An embodiment of the present invention is a glass pot; like Figure 1 The image shows a glass pitcher comprising a heat-conducting structure. Between a heating plate 2 at the bottom and a glass pitcher 3, there is a semi-enclosed interlayer 1 filled with high-temperature resistant molten tin 4 as the heat-conducting medium. The upper part of the heating plate 2 has a raised structure 21 to prevent the high-temperature molten tin 4 from overflowing. The edge 22 of the heating plate does not heat up, and the molten tin 4 solidifies at this point. The concentric rings at the top of the heating plate 2 serve as support pillars 11 for the interlayer 1. During assembly, a solid tin plate is placed in the interlayer 1, which melts into molten tin 4 during operation.

[0016] Example 2 An embodiment of the present invention is a baking pan; like Figure 2 As shown: A baking pan includes a heat-conducting structure. Between the heating film 5 at the bottom and the baking pan 6, there is a jacket 1 filled with high-temperature resistant molten salt 7 as a heat-conducting medium. The jacket 1 is a closed structure to prevent high-temperature liquid from overflowing. A support column 11 is provided inside the jacket 1, and a liquid injection port 12 and a sealing plug 13 are provided on the surface wall of the jacket 1.

[0017] Example 3 An embodiment of the present invention is a rice cooker; Example 3: An embodiment of the present invention is a rice cooker; such as... Figure 3 As shown: A rice cooker includes a heat-conducting structure. Between the heating plate 2 at the bottom and the inner pot 8, there is a sandwich layer 1 filled with high-temperature resistant molten solder 4 as the heat-conducting medium. The sandwich layer 1 is a closed structure, and its surface wall is made of aluminum foil 9. The aluminum foil 9 is soft and easily deformable, allowing for better adhesion to the inner pot 8. Support pillars 11 are provided inside the sandwich layer 1. The edge 22 of the heating plate does not heat up, and the molten solder 4 solidifies at this point. The molten solder 4 does not directly contact the inner pot 8, facilitating separation between the inner pot 8 and the heating plate 2.

Claims

1. A thermally conductive structure, characterized in that: There is a jacket filled with a high-temperature resistant liquid as a heat transfer medium between the heat source and the heated container.

2. The thermally conductive structure according to claim 1, characterized in that: The interlayer is equipped with support columns.

3. The heat-conducting structure according to claim 1 or 2, characterized in that: The outer wall of the interlayer is provided with an injection port and a sealing plug.

4. The heat-conducting structure according to claim 1 or 2, characterized in that: The interlayer is equipped with a semi-enclosed structure to prevent high-temperature liquid from overflowing.

5. The heat-conducting structure according to claim 1 or 2, characterized in that: The heat source is immersed in the high-temperature resistant liquid.

6. A cooker comprising the heat-conducting structure as described in any one of the preceding claims.

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